Auto-click the first question when viewing report cards ..

.. and thereby load the calibration details for the first question in the list
Grouping disputes by quiz ..

List of quizzes is rendered as an accordion
[disputes] Minor changes so that the new accordion behaves as before on-click
[disputes]: Using the disputed response's scan as the alt tag in preview ..

Also, always use preview.isAt to get the position in document-preview ppy-imglist
New method to get a measure of the health of the question bank ..

This method returns the weighted average difficulty level of questions
- on a topic, for a given grade-level - present in the question bank

This measure can be used:
  1. as a hint to the type of questions that should be added going forward
  2. as an independent benchmark of proficiency on a given topic - different from
     the benchmark set by a teacher for her students. The latter could be greater or
     lesser than the independent benchmark
[Teacher]: New method to ascertain the benchmark a teacher set ..

... for students of a given grade level, for a given topic.

Also, using the same basename - benchmark - in all methods where this concept
of benchmarks is in play
New method - expectations_met_in(topic) - added ..

This method returns a number between 0 (none met) and 1 (all met).
The baseline for expectations is as set by teacher - inferred from the
questions she picked
Method mean? now returns the nominal average - not mean percentage
New namespace - chart - for new plotting methods ( using flot )
Student names added as labels in proficiency chart
Reduced line noise in deep-dive
Students listed in alphabetical order
Reduced line noise in deep-dive plot ..

Draw line from students node to lower of avg. db difficulty and
teacher's benchmark
Update graded alongwith marks ..

marks field is updated only if every response in the answer-sheet has been
graded. Which is also when graded needs to be set to true
Colour coding of marks in testpaper summary to indicate progress brought back ..

It had temporarily gone away because of flot related changes/re-write
Added 'color' namespace to standardize calls for color codes
Using color codes defined in charts.js

Also, other minor styling changes
 minor change
Provision for data filters added
Two new query methods added to find ..

.. whether or not the given student took a quiz / testpaper